Using native system methods (not command line), you can reboot your device

Reboot, Reboot Recovery, Reboot Bootloader

Shutdown [4.2+]

Enable or Disable USB Tethering [4.0+, Pro]

Can often bypass carrier restrictions.

VPN [4.0+, Experimental]

Connect/Disconnect from stored VPN profiles

Wireless ADB

Allows you to communicate with your device over Wifi using ADB.

Helper Actions

If you are rooted, you can install the Secure Settings Helper app.The Helper is a small listener application that sits in the system partition that will execute commands given by this application.Android grants applications in the system partition access to more "Secure Settings". It is because of this that the application needs root access to be installed.

With this installed, you gain access to the following functions:

Enable or Disable Accessibility Services

Allows for toggling installed Accessibility Services.

Enable or Disable Data Roaming

Allows for toggling the data roaming functionality in the Settings.

Enable or Disable Day Dreaming [4.2+]

Set Active Day Dream [4.2+]

Enable or Disable GPS

Allows you to set whether the GPS is on or off.

This is useful for devices running Android 2.3+

Update Lock Screen Owner Info

Requires Android 3.0+

Allows you to update the lock screen text.

Change Input Methods

Switch between currently enabled input methods without the prompt!

Helpful if you would like a certain keyboard when in portrait versus landscape mode.

Or if you would like to use a certain keyboard for specific applications.

Enable or Disable Location Services

Allows you to choose whether to use your network location for location awareness.

Set Lock Screen Timeout [4.0+, Pro]

Set how long before the Lock Screen times out after the screen shuts off.